<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <div id="app">
    <h1>{{ sum }}</h1>
    <a href="https://www.mi.com/">{{ text }}</a>
  </div>
  <script src="https://cdn.jsdelivr.net/npm/vue@2.7.14/dist/vue.js"></script>
  <script>
    const app = new Vue({
      el : '#app',
      data : {
        sum : 23,
        text : '小米'
      }
    })
  </script>
</body>
</html>